Henderson Family - Cochrane District

Henderson Family - Cochrane District

My Great Grandparents emigrated to Canada/Cochrane from London in approx. 1912. My Gt Grandfather was George Henderson (b.1863 - d.1932) and he was a plumber. My Gt. Grandmother was Ellen Henderson (b.1863 d.1930). 2 of their daughters went with them. But I have found it impossible to find what has happened to them. They are Grace Ellen Henderson (b.1886 Battersea, London, England) and Muriel Kathleen Henderson (b.1903 in London, England) She was known as Kit. I have seen the death certificates of my Gt. Grandparents and know that Grace signed both of these in Cochrane. Her surname seems to be "Portais" although I can't say for sure. I can't find either of their marriages or anything about them. I have searched and searched and am now leaving this message in the hope someone may be able to help me.